Means for regulating the temperature in explosion motors



April 1935. G. G. ROYE'R 1,996,881

MEANS FOR REGULATING THE TEMPERATUREIN EXPLOSION MOTORS Filed Nov. 4,1932 3 Sheets-Sheet 1 G. G. ROYER 1,996,881

MEANS FOR REGULATING THE TEMPERATURE IN EXPLOSIdN MOTORS April FiledNov. 4, 1932 3 Sheets-Sheet 2 G. G. ROYER MEANS FOR REGULATING THETEMPERATURE IN EXPLOSION MOTORS Filed Nov. 4, 1932 3 Sheets-Sheet 3Patented Apr. 9, 1935 1 I 1,996,881

UNITED STATES PATENT OFFICE MEANS FOR REGULATING THE TEMPERA- 1 TUBE INEXPLOSION MOTORS Georges Gaston Boyer, Paris, France ApplicationNovember 4, 1932, Serial No. 641,314

, In France November 19, 1931 4 Claims. (01. 123174) It has heretoforebeen proposed to regulate the position of the thermostat. But as soon asthe temperature of explosion motors particularly the speed increases,the partial vacuum decreases in motor cars by means of movable shutters,havuntil it becomes practically nil (when the car ing an angle ofincidence which may be varied drives up a hill in direct coupling forexample) 5 so as to insure a more or less intense cooling ofconsequently at the moment when the motor 5 the radiator in which thecooling water circulates gives out the highest number of calories andrethese shutters being placed in front of said radiquires the greatestpossible cooling, said partial ator. vacuum is not then sufficient tomaintain the These shutters were originally actuated by hand thermostatin its operative position, the shutter 10. from a distance by theintermediary of a suitcloses and there is danger of the motor jamming.able system of rods. Now this arrangement re- The object of my inventionis to avoid these quires a special handling on the part of the driverdrawbacks, consequently means are provided so and if it is omitted thereis danger of jamming on that when the vehicle stops the shutters closethe part of the motor which is not then sufiiimmediately to keepthecalories, and that 15. ciently cold; on the other hand the adjustmentwhen the vehicle starts they are ready to open as of the incidence ofthe shutters is quite arbitrary soon as the temperature of the watercontained and consequently only varies at the drivers will. in theradiator requires it. 1

' It has also been proposed to utilize a thermo- It has been thoughtadvisable to this end to first stat immersed for example in the waterconconstruct the body of the movable thermostat tained in the radiatorto effect the adjustment in such a manner that it may occupy two differ-20 of the shutters in function ofthe water tement positions, that is onein which its operation perature, in' that "case the opening and theclosmay act positively upon the control of the shuting of the shuttersis operated automatically and ters and the other in whichits operationis withprogressively, but their closing (when the vehicle out positiveeffect upon saidcontrol; in the first stops for example) being alwaysvery slow it folcase, it may be said that the thermostat is in 25 lowsthat the motor has evacuated most of its circuit and in the second casethat it is out of calories before the shutters are completely closed,circuit. Now the displacement of the thermoit is therefore necesary toheat it there and then stat body from its position in circuit to thatbeforethe necessary'power for starting has been out of circuit andinversely, is brought about produced, this resulting in aloss of timeand cardirectly by an operation that the driver must 3o burant. performwhen starting and stopping'his carriage,

It has then been thoughtto utilize the pressu h as app yin releasing thehand brake sure of the lubricating oil or the partialvacuum lever, orelse opening and shuttingv the ignition produced by the motor exhaustfor previously circuit, or the carburant circuit, etc.

adjusting the position of the thermostat and put Owing to this doublearrangement the driver 35 the latter in'proper condition for controllingthe is certain that at the moment of starting, the shutters or on thecontrary bringing it back to thermostat being put in circuit it willoperate the'position of rest. the shutters proportionally to the heatingof the Inthe first case, as long as the motor is relawater in theradiator. As long as the vehicle 40 v y cold, e Oil pressure issufficiently high is running, the operation of the shutters is con- 40efiect this previous adjustment of the thermotrolled by the temperatureof the water contained s but as soon as e motor has reached its in theradiator, and when it stops the thermostat normal temperature the oilpressure decreases being put autcmaticauy tout of circuit by theconslderably and has no longer the power driver (who applies the handbrake or cuts off quired to maintain the thermostat in its operacloseinstam the ignition, etc.) the shutters W1 I taneously in order topreserve the heat of the motor.

tive position, this may result in an ill-timed closing'of the shuttersand jamming of the motor which is notsufficiently cold. This arrangement1 requires an additional on piping which may The movable thermostat bodywill be advanbecome the source of serious disturbances contageously putin serifis with Its V device 50 sidering the. continuous vibrations towhich the (by the drivel) and W the transmlttmg fif radiator is exposed.from the thermostat to the shutters. It will in the second case, whenthe motor is idling else b dv a ous to p a t bo y o t the partial vacuumproduced by suction is largely m v he mo in i a b f yl n ll alsufficient-to effect this previous adjustment of shape for example, indirect contact ,with the 55 sme ma spring I9 whi n But in a preferredmode of execution an an. tagonistic spring designed to act against the"spring that closes the shutter and-whichis more is placedbehin'd thepowerful than the latter thermostat body; said spring being compressedwhen the thermostat is put out of circuit'so'thatin case of rupture ofthedriving wire-the ther-' mostat will always return in circuitofitself, and thus act as regulating device.

The driving means which control "the moveinents of the thermostat; as aunit mayalso'be combined with a rod having a suitable length to produceforcibly the opening of the shutters when starting and their closingwhen -the carriage stops.

The-appended drawings show by way of examples various modes of executionof the object of my invention which comprises-the utilization of thehand brake of the motor car- Referring now more particularly to thechar-' acters'ofreference in-Figs. 1 to4 of the drawings, thenumeral Idenotes the thermostat body sliding-without play :in a cylinder 2insertedbetweenthe radiator walls 3- 3; 4 is the driving rod-for thethermostat which extends more or lessoutside the thermostat-bodyaccording to the degree of expansion :or- 'ofcontraction of thethermostatic'substance contained therein.- The rod-is provided=at itsend with a push device -5 which may 'act upona lever- 6 pivoted at 7when the thermostat is=-in .circuit one'arm 6 of said'lever'beingconnected with the rod 8 which controls the incidenceof the radiatorshutters.

A lever 9 pivoted at 10 "and connected at its other end-to the wire H ofa Bowden having its sheath 12 secured upon a support l3 acts through its-head '9 upon the backportion of the thermostat body. I. The sheath I2is: secured at the other end'of the Bowden to a stationary bearing M andthe wire is secured by means of-a compensating spring I5 to the end of alevertfi pivoted at l1 which drives-the hand brake'by means ofasy'stem-oi rods l8;

Fig. 1 shows the" thermostat in the out of circuit position that is to.say the position in which it cannot in any case operate the shutters.'The push device 5 comes to the position shown in this figure only whenthe vehicle has stopped for" a certain time when; the temperature a hassuiiiciently cooled-down.

Fig. 2 shows the thermostat in the-*in circuit position in which it hasbeen brought bythe-release of the brake lever 16; the thermostat isready to operate the shutters-through'its push device 5 the car is readyfor starting.

Fig. 3 shows the thermostat still incircuit in the act'of controllingtheincidence of the shutters which it opens.

Fig; 4 shows the manner in whichjthe car being stationary and the brakelever having been actuated by the driver, the head- 9'fof lever 9 hasbeen drawn backwards and the body 'I hasalso been-brought in theposition indicated in Fig. 1 the spring l9 being more powerful thanspring I5. In that position the thermostat cannot continue to operatethe shutter as long as the brake remains applied. When the car hasremained stationary for a certain length of time, the rod 4 moves backinside the thermostat and the push device 5 comes in the position shownin Fig. 1.

The support I3 is perforated with two holes 20 which allow thelocking'of the lev'er'S (provided with a hole 2|) in either of its endpositions for example by means of a pan.

Fig, 5'shows 'a mode of execution of my invention which "is remarkablyadvantageous: it comprises a spring 23 placed behind the thermostat bodyl, which when the brake is released (Fig; 5)- returns'the back of thebody I to a stalever 6-6 tionaryrposition suitable for the operation ofthe thermostat. The position of the body is regulable'by means of a stopconstituted by two nuts 24 carried uponthe rod which connects the body 1with the-wire H extending-to the brake lever [6 above the pivotal axisI7;

Fig; 5 corresponds to the time when the-car is moving, the thermostatpiston 5 being then at a certain distancefrom the body-I 'keeps theshutters open. When the driver applies the brake in order to stop thecarriage the body I comes'in the position-out of circuit" andcompressesthe spring 23. The reverse operation will return the bodyto the positionshown in'Fig. 5. In the case of ruptured the wire II the thermostat bodywould nevertheless be returned to. the ""in circuit position-through theaction of spring =23;

It will be understood thattheresistane of the spring 23 must be suchthatwhenthe' piston 5 moves forwardthe springwhich controls the return ofthe'shutters stretches but that the spring 23 does'no yield.--

In thesame manner and without departing from the limits of thisinvention, thethermostat body could be moved from its out of "circuit"position to" its in circuit position through the operationj'of lightingthe car or opening the carburant circuit or by any other'operationzexeouted by the -driver when starting the carriage and involving-thereverse operation" when the latter stops.= Fig. 6 shows the same parts,they are indicated by similar characters of reference as previously. Inthis case the thermostat is replaced byra:rod 22, sliding inthecyIinder-"Z and interposed exactly between the head '9' of lever 9andthe-head of lever- 6. The length of'this rod is calculated so.-thatwhen the brake is applied (Fig. 5) the shutters may close entirelyunderthe actionof spring l9 and that the heads may 'be' moved backwards, sothat on the brake 'beingreleased therhead 9"wi1l force back the rod 22"thus' causingthe shutters to openin full.

Having now described and ascertained the nature of my invention and inWhat manner the same is to'be performed I declare that what I claim is:

l.'A device mounted upon a vehicle also provided with a pivoted brakelevel", which comprises; a radiator to return the shutters to theirposition ofclosing, an oscillating lever connected with said spring, athermostat designed to set on said lever against said spring when thetemperature rises, said thermostat being slidably mounted in a tubewhich passes through the water contained in the radiator,

provided with shutters; a spring a second oscillating lever comprisingmam-the I t of the thermostat opposite that which acts upon the firstlever and the second arm of the second oscillating lever being connectedwith the brake lever below the pivotal axis of the latter.

2. A device mounted upon a vehicle also provided with a pivoted brakelevenwhich comprises; a radiator provided with shutters, a spring toreturn the shutters to their position of closing, an oscillating leverconnected with said spring, a thermostat designed to act on said leveragainst said spring when the temperature rises, said thermostat beingslidably mounted in a tube which passes through the water contained inthe radiator, a second oscillating lever comprising two arms, the firstarm bearing upon the end of the thermostat opposite that which acts uponthe first lever and the second arm of the second oscillating lever beingconnected with the brake lever on the vehicle below its pivotal axis bymeans of a transmission in which a spring, Weaker than the return springfor the shutters, is inserted.

3. A device mounted upon a vehicle also provided with a pivoted brakelever, which comprises: a radiator provided with shutters, a spring toreturn the shutters to their position of closing, an oscillating leverconnected with said spring, a thermostat designed to act on said leveragainst said spring when the temperature rises, said thermostat beingslidably mounted in a tube which passes through the water contained inthe radiator, another spring freely located behind the end of thethermostat opposite the one which acts upon the lever connected with thereturn spring of the shutters, a cover secured at the end of theaforesaid tube to serve as a support for this spring, a screwthreadedrod secured to that end or" the thermostat and passing through saidcover, nuts threaded upon said rod outside the cover in order toregulate the initial compression of the spring which bears upon thecover, and a transmission between said screwthreaded rod and a point ofthe brake lever of the vehicle above the pivotal axis of the latter, theresistance to the pressure upon the aforesaid spring being higher thanthe resistance of the spring controlling the return of the shutters.

4. A device for controlling the temperature of the motor of a vehiclewhich comprises a radiator for containing cooling water and havingshutters, a spring connected to said shutters and tending to return themto closed position, a lever connected to said spring, a pivot for saidlever, a thermostat for acting on the lever against the influence of thespring, a tube which passes through the water in the radiator, saidthermostat being slidably mounted in the tube and being in operation infree contact with said lever, and a flexible connecting means betweensaid thermostat and the brake lever of the vehicle, in such a mannerthat when the brake lever is applied, the spring is released and,contracting, closes the shutters again and pushes back the thermostat bymeans of the lever connected to the said spring, while when the brakelever is released, the thermostat is returned to a position in front ofthe lever connected to the spring, and is thus in position to actuatethis lever and to open the shutters when the temperature rises.

GEORGES GASTON ROYER.

